Download USER'S MANUAL - A&E Gauges Ltd

THE AE6 AIR/
ELECTRONIC TRANSDUCER
USER’S MANUAL
Issue no. 5: Feb. 2005
A&E GAUGES LTD.
Unit 7
Redbourn Industrial Estate
Redbourn
Hertfordshire
AL3 7LG
Tel: +44 (0)1582 794136
Fax: +44 (0)1582 794463
E-mail : [email protected]
Web:
www.a-egauges.co.uk
THE A & E GAUGES A/E.6/ELECTRONIC TRANSDUCER
SECTION 1 : INTRODUCTION
1.
GENERAL DESCRIPTION
The A & E Gauges A/E.6 Air/Electronic Transducer permits the use of air gauge measuring heads, such
as air plug or air ring gauges, with a variety of A & E Gauges Electronic Units. In addition to providing
very high magnification, the simplicity of air gauge measuring heads is combined with electronics to
provide benefits such as high accuracy tolerance indication, differential and match gauging, and SPC
(Statistical Process Control). Precision at high magnification is ensured by restricting the standard
measuring range to a maximum of ±0.015mm (±0.0005 in). There is a special measuring range of up to
±0.050mm (±0.002 in). For very special applications, longer measuring ranges are possible: A & E
Gauges Technical Dept. will be pleased to advise on receipt of a detailed requirement.
Two versions are available with a differing connection for the measuring head, and are designated as
follows:
A/E.6
(Part No 96100.005)
A/E.6F (Part No 96100.007)
-
Standard version with bayonet connection.
Fixture version with G1/4 (BSP Parallel) connection.
Two M5 clearance holes are provided on the body of the transducer for securing it to a bench or fixture;
multiple transducers can be secured to each other.
1.1
OPERATING PRINCIPLE (Fig.1)
Compressed air at a minimum gauge pressure of 4.8 bar (70 psi) is filtered and regulated externally to a
gauge pressure of 2.96 bar (43.0 psi) before entering the transducer, through the magnification control,
to one side of a diaphragm sensitive to minute changes in pressure. Air flows to atmosphere through
one or more jets in the gauge measuring head, and variations in pressure against the diaphragm result
from variations in the clearance between the measuring head and the work piece.
The movement of the diaphragm is detected by an electronic probe and indicated by the gauge unit.
Probes of differing sensitivity are used for differing applications; full details of Probe/Gauge Unit are
given in section 1.4.
The zero control on the gauge unit and the magnification control on the transducer are used to calibrate
the system using suitable masters. The zero control on the transducer is only used in special applications
and can be blanked off to prevent tampering.
IMPORTANT
The transducer must be used with a suitable air filter and pressure regulator and we recommend our
Air/filter/regulator/monogauge unit (Ref No 95050.641).
1
1.3
TRANSDUCER/GAUGE UNIT COMPATIBILITY
The A/E.6 Transducer can be used with any of the current range of A & E approved electronic gauge units;
in addition, some of the older obsolete ‘155’ Series may also be used. The Gauge Units comprising these
systems are as follows:
IBR
Mercer 122 series, EL80/83/87/90, EL300
EL400, EL500,etc.
Tesa.
1.4
PROBE/GAUGE UNIT COMBINATION
The following table summarises the type of probe which must be fitted to the Transducer when used with a
particular Gauge Unit. For details see Section ll.
GAUGE TYPE
PROBE TYPE
Standard
Special
Application
Application
122 Series,
EL80/83/87/90,EL300,
EL400, EL500
493
495
Microline.
490
490
(Used with divisors programmed into Microline).
3
SECTION ll : SETTING INSTRUCTIONS
2.0
INSTALLATION
Connect the Filter/Regulator Bracket and the Transducer to the main air supply as illustrated in Fig.2. Make
sure that all connections are air-tight. Purge filters by opening drain taps [Fig.2 (2)] and turning on the air
supply. Close drain taps and check that the pointer of the pressure gauge [Fig.2 (3)] is between the two
scale marks.
IMPORTANT
The filters must be drained daily and the bowls washed occasionally with soap and water.
NEVER USE SOLVENTS. See Air Filter Regulator Bracket(AFRB) instruction sheet.
2.1
PROBE/GAUGE UNIT/GAUGE HEAD COMBINATION
It is absolutely essential that the correct probe appropriate to the gauge unit is used. Details are given in the
following Table, columns 2 to 4.
It is essential that the correct measuring head (air plug or air ring) is used; the markings detailed in column 2
of table 1 are marked on the gauge plug adaptor.
1
Application
2
Probe Type
3
4
Sensitivity
Dimension 'A'
mm
inch
493
Standard
490
Long Range
1\3
0.095 mm
0.0037”
1\1
0.285 mm
0.0112”
1\2
0.142 mm
0..0056”
495
Deep Jet
Table 1: Transducer Probe data
4
2.2
CONNECTING THE PROBE
The Transducer is normally supplied with the probe assembled; if it is not fitted proceed as follows:
i
ii
iii
iv
Shut off the air supply using tap Fig.2 (1) : Section 2.7
Wait until the air is completely emptied from the system.
Insert the probe into the Transducer and lightly clamp the screws.
Insert the probe connector into the gauge unit as follow:
For air plugs insert into the A – (minus) socket.
For air rings insert into the A + (plus) socket.
Note: On ‘122’ series gauge units, the ‘B’ Channel may be used if preferred.
The polarity on the Microline is included as part of the gauge program.
2.3
SETTING THE GAUGE UNIT
i
Check that the Gauge Unit is correctly calibrated in accordance with the instructions appropriate to
the Unit.
Note: If the Transducer probe is used for this purpose, note the different sensitivity ratios:
490 is 1/1
493 is 1/3
495 is 1/2
i.e.1,0 mm reads 1,0 mm
i.e.0,9 mm reads 0,3mm
i.e.1,0 mm reads 0,5mm
ii
Set the zero control to mid-travel.
iii
Select the range given in column 4 of Table 1 (Section 2.1), note the
following:
a. Electroline 80/87 series range is selected by means of an interchangeable plug. Ensure that the
appropriate Range Plugs are available for both Setting and Gauging.
b. ‘Microline’: it may be necessary to temporarily reprogram sensitivity for ‘L’ Low
Sensitivity for the purpose of setting the Transducer; in some cases a separate transducer
Channel is provided. Check with the instructions supplied with the equipment.
c. ‘155’ Units only: check that the slider switch at the rear of the Unit is set at the ‘NORMAL’ (up)
position.
5
2.4
SETTING THE TRANSDUCER
i
Lightly clamp the probe in the Transducer until the gauge meter reads the approximate value of
dimension ‘A’ in Table 1. Column 4.
Note: The reading should be plus (+) for Air Plugs and minus (-) for Air rings when match gauging:
see Section lll.
2.5
ii
Securely clamp the probe with both screws but do not over tighten.
iii
Set the gauge meter reading to the exact value for dimension ‘A’ using the zero control of the gauge
unit.
(Microline has a special auto zero procedure: refer to the appropriate manual).
MASTER SETTING GAUGES
When using air gauge measuring heads (air plugs and air rings etc), it is necessary to range the indicating
equipment to suit the measuring head. This is done using two Setting gauges; master rings for air plugs and
master plugs for air rings.
For some applications a third ’zero’ gauge may be required.
Standard setting gauges are made PLUS and MINUS from the nominal size to be measured; they are
calibrated in temperature-controlled conditions and are marked with the mean (zero) size and a ‘SET +’ or
‘SET -’ value.
EXAMPLE: a PLUS setting ring may be marked:-
2.6
12,700 mm +0,0117mm
or (0,5000 in +0.00046in).
FINAL SETTING: PRELIMINARY
i.
Turn the air supply ON [Fig.2 (1)]
ii.
Check that the monogauge [Fig.2 (3)] registers between or within 1,5 mm of the red lines.
iii.
Screw both transducer control(s) [Fig.2 (5)] right in (clockwise).
IMPORTANT NOTE:
The zero control (unmarked) is only required when ‘long range’ measuring heads are used.
iv.
Set the range of the gauge unit to suit the range of the gauge head to be used.
6
FINAL SETTING: AIR RING & OPEN JET CALIPER GAUGES
i.
Connect the probe to the ‘A’ plus (+) socket or check that, where appropriate, the correct polarity has
been programmed.
ii.
Insert the ‘MINUS’ setting plug into the air ring.
iii.
Unscrew the control [Fig.2 (5)] marked ‘M’ until the display reads the
‘SET – ’ (minus) value marked on the setting plug.
iv.
Replace the ‘minus’ plug with the ‘PLUS’ setting plug.
NOTE: it is unlikely that the reading will correspond exactly with the calibrated ‘SET –’ (minus)
value; to adjust proceed as follows:
v.
AIR RINGS for STANDARD measuring range: adjust to the ‘SET +’ (plus) value using the gauge
unit ‘ZERO’ control.
AIR RINGS for LONG measuring range: adjust to the ‘SET +’ (plus) value using the transducer
(unmarked) zero control [Fig. 2(5)].
vi.
Replace the ‘MINUS’ plug and using the transducer control marked ‘M’, overcorrect by 3 to 4 times
the amount of error.
vii.
Repeat this procedure until the correct setting is achieved, ensuring that adjustments are made as
follows:
With the ‘MINUS’ plug in the Air Ring use the transducer ‘MAG’ control marked ‘M’
With the ‘PLUS’ plug in the Air Ring:
For ‘Standard Range’ plugs use the gauge unit ‘ZERO’ control.
For ‘Long Range’ Plugs use the Transducer (unmarked) zero control
NOTE: When used with ‘MICROLINE’, zero is adjusted using the special auto zero procedure.
SPECIAL NOTE WHEN USING ANALOGUE UNITS
It may be convenient when setting to switch to a longer range (lower magnification), final adjustment for the
zero setting must be made at the correct range to be used when gauging. For this reason a ‘zero’ Setting
Gauge may be necessary in addition to the ‘Plus’ and ‘Minus’ Gauges.
8
SECTION lll : MATCH GAUGING
3.0
INTRODUCTION
Match gauging is the term used to describe equipment designed to measure the difference in size, or fit,
between matching components (shafts and bores).
The fit may be classified as clearance, interference or transition.
3.1
EQUIPMENT USED
i
Any Gauge Unit in the ‘122’ or two-column Electroline series may be used.
3.2
ii
The bore is measured with an air plug gauge and the A/E6 transducer; the shaft may be measured with
a comparator and probe or an electronic calliper.
iii
Two calibrated setting rings are required to ‘range’ the air plug, a third ring made to the mean size of
the component matches a mean-size plug, used to set thecomparator or caliper.
MATCH GAUGING WITH ‘122’ SERIES GAUGE UNITS
The method consists of measuring the bore with the ‘A’ channel, the shaft with the ‘B’ channel and, by
combining the two readings; the ‘A,B’ setting will give their difference.
i
Before connecting any probes to the gauge unit, use the ‘A’ and ‘B’ controls to set both channels to
read zero.
ii.
Set the ‘122’ Unit as described in its own manual and set the air plug and transducer as described in
Section ll of this manual. Following the procedure described,the transducer probe will be fitted to the
‘A’ minus (A-) socket.
iii
Connect the probe from the comparator or caliper to the ‘B’ minus (B-) socket.
iv
Set the comparator/caliper closely to ‘zero’ but note that, because the probe is connected to give minus
polarity, all deviations must be reversed.
EXAMPLE: A setting plug calibrated -0,002mm must be set to give a reading of +0,002mm, i.e. to
the right of zero. This is necessary to achieve the correct polarity at the ‘A,B’ matching setting.
v
With the mean size setting ring on the Air Plug and the setting plug in position in the
comparator/caliper, turn to the ‘A,B’ setting and check that the meter reads the difference between the
two masters. Any small error should be corrected by re-checking the setting of Air Plug and
comparator/caliper.
CLEARANCE will be indicated as plus (+), to the right of zero;
INTERFERENCE will be indicated as minus (-), to the left of zero.
NOTE: If it is required only to check the actual size of the shaft, it is important to remember that
polarity is reversed; where a batch of shafts is to be measured prior to matching. It may be more
convenient to transfer the probe connector to ‘B’+ and reset.
9
SERVICE
Your gauging and inspection procedures are a critical part of your production
process, and their integrity is vital to your business.
Regular maintenance and calibration of this air gauge will ensure continuity
of its usefulness, assure accuracy of measurement and prolong its service life.
Time and production losses through unplanned repairs will be minimised.
Current BS/ISO approval requires regular maintenance and traceable calibration
of all gauges and test equipment used in a manufacturing process.
A & E Gauges Ltd offers comprehensive service and calibration facilities for all
its products. In line with current British Standard and ISO requirements we
recommend that any gauge is serviced at least once a year. Some quality
procedures require more frequent equipment servicing and re-calibration.
A & E Gauges gauging references are fully traceable to National Standards.
Conformity and calibration certificates are available if required.
Full service support is provided for all air gauging products, and on-site service
contracts for larger users are strongly recommended. The Service Department
will be pleased to provide full details of service rates and contract terms.
Contact :
The Service Department
A & E GAUGES LTD.
Unit 7
Redbourn Industrial Estate
Redbourn
Herts
AL3 7LG
Tel:
+44 (0) 1582 793528
Fax:
+44 (0) 1582 794463
E-mail:
[email protected]
Web:
www.a-egauges.co.uk